Rapid growth of online education and the perceived difference between online and face-to-face instruction has necessitated training and support for instructors transitioning to online delivery. The research reported here resulted from an evaluation of a six-week fully online training program, "Preparing Online Instructors" "(POI)", to determine what constitutes an effective online training program. It was found that online training programs should emphasize both technological and pedagogical skill development, evaluate participants' training needs prior to the training, and provide ongoing resources and support mechanisms after the training. The findings from the study inform administrators and professional development providers on how to plan and implement an instructor-training program to enhance online teaching skills. (Contains 4 tables.)